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How to replay callbacks from an AEL script ?

Question asked by CEDRICPUJOL on May 4, 2005
Latest reply on May 10, 2005 by CEDRICPUJOL

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Hi,

I'm trying to figure out a way of replaying a parameter callback from an AEL function. Up to now, I only manage to make ADS crash which is not my point

Let's say that I have a callback defined this way

defun mycb(cbP,clientData,callData) {
de_info("callback");
}

What should I pass in my script to replay it ? I know how to define clientData but I have no idea of what to give to cbP and callData !

Any help would be appreciated.

Cedric

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mfredrik May 4, 2005 3:19 AM
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Typically a callback function contains functions like:

pcb_get_mks();
pcb_set_mks();

You can not use these functions in other context than within a parameter callback! I.e. you can not execute it from a non-callback function. I guess this is the reason why you are crashing ADS.

So, there is no idea of figuring out the input parameters if this is your case. You will not be able to execute this function from another AEL function if your code contains these functions.
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CEDRICPUJOL May 5, 2005 9:22 PM
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Hi,

Thanks for the answer. So if I could not execute my callbacks from an AEL script, is there a way to recreate a callback context ? Some kind of macro that could emulate on the fly a click on the parameters when parsing all the instances ?

Thanks in advance.

BR,

Cedric
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mfredrik May 9, 2005 6:07 AM
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Hi Cedric,

That's a very good question! I should have thought of that option when I replied to you.

Anyway, if you update the value of a component parameter that has a parameter callback defined then the callback script is fired. This is true if you do it manually in the edit dialog, on screen and even through an AEL call.

You can use
de_update_parameters()
Get Instance Parameters

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CEDRICPUJOL May 9, 2005 7:58 PM

Hi,

Thanks Mats for your reply. I wrote a script that allows me to do what I wanted using the de_update_parameters. Nevertheless, I'm confused by one thing.

In the following basic script that counts the number of instances in the design :

defun CountAllInstances(update) {
decl designName = de_current_design_name();
decl design = db_get_design(designName);
decl repH = db_get_rep(design,REP_SCHEM);
decl countinstances = 0;
decl instH = db_first_instance(repH);
while (instH) {
countinstances++;
decl paramH = db_get_instance_attribute (instH, INST_PARAM_HEAD);
decl device = db_get_instance_attribute (instH, INST_NAME);
while (paramH) {
decl paramName = db_get_parm_attribute(paramH, PARM_NAME);
decl value = db_get_parm_attribute(paramH, PARM_VALUE_SVALUE);
if (update==1) de_update_parameters(designName, REP_SCHEM, list(device,paramName,value));
paramH = db_next_parm(paramH);
}
instH = db_next_instance(instH);
}
de_info(strcat(countinstances," instances in the design"));
}

If you run CountAllInstances(), it returns the correct number of instances.

If you run CountAllInstances(1) (mode with de_update_parameters), it always returns 1 instance whatever the number of instances really is.

Am I missing sth ?

Regards,

Cedric

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mfredrik May 10, 2005 3:15 AM

Hi Cedric,

The reason for this is that once you update anything in the schematic then you invalidate the instance handles (pointers) for the design, i.e. you have to re-query them. That's a tricky thing with AEL. The problem is that if you start over to get the instance handles then you have to keep track of which instances you have updated and skip them.

You could build a list of instance ID's and track which ones you've touched and make sure you skip them. Another approach is to first build a list of all instance ID's, then iterate through that list. Something like this:

defun getAllInstances() {
Â decl designName Â Â Â = de_current_design_name();
Â decl design Â Â Â Â Â Â = db_get_design(designName);
Â decl repH Â Â Â Â Â Â = db_get_rep(design,REP_SCHEM);
Â decl retList;

Â decl instH Â Â Â = db_first_instance(repH);
Â while (instH) {
Â Â decl device Â Â Â = db_get_instance_attribute (instH, INST_NAME);
Â Â retList=append(retList,list(device));
Â }
Â return retList;
}

defun mainProg() {
Â decl instList = getAllInstances();
Â decl currInst;
Â while (instList) {
Â Â Â currInst = car(instList);
Â Â Â
Â Â Â // Update the component here!
Â Â
Â Â Â // Remove the first entry in the list
Â Â Â instList = cdr(instList);
Â }
}

Haven't tried the code, but it should be pretty close I hope.. ::)

-Mats

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CEDRICPUJOL May 10, 2005 7:29 PM

Thanks for this explanation Mats.

BR,

Cedric

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How to replay callbacks from an AEL script ?

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